Battery 112

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Battery 112 (1944-1948) - Battery 112 was a reinforced concrete, World War II 16 inch coastal gun battery on Camp Hero, Montauk Point, Suffolk County, New York. Renamed Battery Dunn in 1942. Battery construction started 23 Mar 1942, was completed on 5 Jun 1943 and transferred to the Coast Artillery for use 12 Jan 1944 at a cost of $ 1,369,528.61. Deactivated in 1948.

World War II

Part of the Harbor Defense of Long Island Sound.

Originally built as a World War II reinforced concrete coastal gun battery with two 16" MarkII-M1 guns mounted on M4 carriages. This was a single level 16" gun battery with both guns casemated and separated by a central magazine and support facility. Shells were moved from the magazine to the gun loading platform by chain hoists traveling on an overhead track system. Electrical power furnished by an internal power plant and by commercial power. The whole facility was covered with earth except for the gun ports and the battery entrances. Additional foliage and camouflage netting provided further cover.

The guns and carriages were transferred from the Watervliet Arsenal in June-July 1943 and the battery was accepted for service on 12 Jan 1944.

Battery 112 was placed on inactive status on 7 Feb 1947 and the guns were salvaged later in 1948.

Battery 112 Armament (edit list)
Model Serial
Manufacturer Carriage Service
1 16" Rifle 816" MarkII-M1 92 Navy Casemated Barbette (CBC),
M4, #42, Watertown
1944-1948 See note 1
2 16" Rifle 816" MarkII-M1 73 Bethlehem Casemated Barbette (CBC),
M4, #43, Watertown
1944-1948 See note 1
Source: RCW Form 1, 9 Sep 1944, Coast Defense Study Group, Berhow, Mark A. ed, American Seacoast Defenses: A Reference Guide, 2nd Edition, CDSG Press, McLean, VA, 2004, ISBN 0-9748167-0-1, pages 176-177, 206
Note 1: Guns and carriages transferred from Watervliet June-July 1943. CDSG Gun Card Collection from NARA
Battery 112 Plan

Current Status

No period guns or mounts in place. Entrances covered.

Location: Camp Hero State Park, Montauk Point, Suffolk County, New York

Maps & Images

Lat: 41.0624868 Long: -71.8772739


  • U.S.Army, Supplement to the Harbor Defense Project of Long Island Sound, (HDLIS-AN-45), 15 Feb 1945, CDSG


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